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Bethsoft VID demuxer and video decoder 

patch by Nicholas Tung, ntung ntung com

Originally committed as revision 8649 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Nicholas Tung 2007-04-07 20:51:58 +00:00 committed by Diego Biurrun
parent e5b5149603
commit 1e6c67599e
11 changed files with 393 additions and 0 deletions
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1
Changelog
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@ -78,6 +78,7 @@ version <next>
- Gamecube movie (.THP) playback system
- Blackfin optimizations
- Interplay C93 demuxer and video decoder
- Bethsoft VID demuxer and video decoder
version 0.4.9-pre1:

3
doc/ffmpeg-doc.texi
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@ -905,6 +905,8 @@ different game cutscenes repacked for use with ScummVM.
@tab Used on the Nintendo GameCube.
@item C93 @tab @tab X
@tab Used in the game Cyberia from Interplay.
@item Bethsoft VID @tab @tab X
@tab Used in some games from Bethesda Softworks.
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
@ -1015,6 +1017,7 @@ following image formats are supported:
@item DXA Video @tab @tab X @tab Codec originally used in Feeble Files game.
@item AVID DNxHD @tab @tab X @tab aka SMPTE VC3
@item C93 Video @tab @tab X @tab Codec used in Cyberia game.
@item Bethsoft VID @tab @tab X @tab Used in some games from Bethesda Softworks.
@end multitable
@code{X} means that encoding (resp. decoding) is supported.

1
libavcodec/Makefile
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@ -54,6 +54,7 @@ OBJS-$(CONFIG_ASV1_ENCODER) += asv1.o
OBJS-$(CONFIG_ASV2_DECODER) += asv1.o
OBJS-$(CONFIG_ASV2_ENCODER) += asv1.o
OBJS-$(CONFIG_AVS_DECODER) += avs.o
OBJS-$(CONFIG_BETHSOFTVID_DECODER) += bethsoftvideo.o
OBJS-$(CONFIG_BMP_DECODER) += bmp.o
OBJS-$(CONFIG_BMP_ENCODER) += bmpenc.o
OBJS-$(CONFIG_C93_DECODER) += c93.o

1
libavcodec/allcodecs.c
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@ -58,6 +58,7 @@ void avcodec_register_all(void)
REGISTER_ENCDEC (ASV1, asv1);
REGISTER_ENCDEC (ASV2, asv2);
REGISTER_DECODER(AVS, avs);
REGISTER_DECODER(BETHSOFTVID, bethsoftvid);
REGISTER_ENCDEC (BMP, bmp);
REGISTER_DECODER(C93, c93);
REGISTER_DECODER(CAVS, cavs);

2
libavcodec/avcodec.h
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@ -161,6 +161,7 @@ enum CodecID {
CODEC_ID_THP,
CODEC_ID_SGI,
CODEC_ID_C93,
CODEC_ID_BETHSOFTVID,
/* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
@ -2252,6 +2253,7 @@ extern AVCodec amr_wb_decoder;
extern AVCodec asv1_decoder;
extern AVCodec asv2_decoder;
extern AVCodec avs_decoder;
extern AVCodec bethsoftvid_decoder;
extern AVCodec bmp_decoder;
extern AVCodec c93_decoder;
extern AVCodec cavs_decoder;

139
libavcodec/bethsoftvideo.c Normal file
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@ -0,0 +1,139 @@
/*
* Bethesda VID video decoder
* Copyright (C) 2007 Nicholas Tung
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file bethsoftvideo.c
* @brief Bethesda Softworks VID Video Decoder
* @author Nicholas Tung [ntung (at. ntung com] (2007-03)
* @sa http://wiki.multimedia.cx/index.php?title=Bethsoft_VID
* @sa http://www.svatopluk.com/andux/docs/dfvid.html
*/
#include "common.h"
#include "dsputil.h"
#include "bethsoftvideo.h"
#include "bytestream.h"
typedef struct BethsoftvidContext {
AVFrame frame;
} BethsoftvidContext;
static int bethsoftvid_decode_init(AVCodecContext *avctx)
{
BethsoftvidContext *vid = avctx->priv_data;
vid->frame.reference = 1;
vid->frame.buffer_hints = FF_BUFFER_HINTS_VALID |
FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
avctx->pix_fmt = PIX_FMT_PAL8; // palette in vid->frame.data[1]
av_log(avctx, AV_LOG_DEBUG, "[bethsoftvid video decoder] init\n");
return 0;
}
static void set_palette(AVFrame * frame, uint8_t * palette_buffer)
{
uint32_t * palette = (uint32_t *)frame->data[1];
int a;
for(a = 0; a < VID_PALETTE_NUMCOLORS; a++)
{
palette[a] = AV_RB24(&palette_buffer[a * 3]) * 4; // multiply all colors by 4
}
frame->palette_has_changed = 1;
}
static int bethsoftvid_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
BethsoftvidContext * vid = avctx->priv_data;
char block_type;
uint8_t * destination;
uint8_t * frame_end;
int line_remaining = avctx->width; // number of bytes remaining on a line
const int wrap_to_next_line = vid->frame.linesize[0] - avctx->width;
uint8_t rle_num_bytes;
int yoffset;
av_log(avctx, AV_LOG_DEBUG, "[bethsoftvid video decoder] decoding frame\n");
// reget buffer will copy old data, good for simple difference frames
if (avctx->reget_buffer(avctx, &vid->frame)) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return -1;
}
destination = vid->frame.data[0];
frame_end = vid->frame.data[0] + vid->frame.linesize[0] * avctx->height;
switch(block_type = *buf++)
{
case PALETTE_BLOCK: set_palette(&vid->frame, buf); return 0;
case VIDEO_YOFFSET_DIFFERENCE_FRAME_BLOCK:
yoffset = bytestream_get_le16(&buf);
if(yoffset >= avctx->height) { return -1; }
destination += vid->frame.linesize[0] * yoffset;
}
// main code
while((rle_num_bytes = *buf++))
{
int length = rle_num_bytes & 0x7f;
// copy any bytes starting at the current position, and ending at the frame width
while(length > line_remaining)
{
if(rle_num_bytes < 0x80) { bytestream_get_buffer(&buf, destination, line_remaining); }
else if(block_type == VIDEO_FULL_FRAME_BLOCK) { memset(destination, buf[0], line_remaining); }
length -= line_remaining; // decrement the number of bytes to be copied
destination += line_remaining + wrap_to_next_line; // skip over extra bytes at end of frame
line_remaining = avctx->width;
if(destination == frame_end) { goto end; }
}
// copy any remaining bytes after / if line overflows
if(rle_num_bytes < 0x80) { bytestream_get_buffer(&buf, destination, length); }
else if(block_type == VIDEO_FULL_FRAME_BLOCK) { memset(destination, *buf++, length); }
line_remaining -= length;
destination += length;
}
end:
*data_size = sizeof(AVFrame);
*(AVFrame*)data = vid->frame;
return buf_size;
}
static int bethsoftvid_decode_end(AVCodecContext *avctx)
{
BethsoftvidContext * vid = avctx->priv_data;
av_log(avctx, AV_LOG_DEBUG, "[bethsoftvid video decoder] closing\n");
if(vid->frame.data[0]) { avctx->release_buffer(avctx, &vid->frame); }
return 0;
}
AVCodec bethsoftvid_decoder = {
.name = "bethsoftvid",
.type = CODEC_TYPE_VIDEO,
.id = CODEC_ID_BETHSOFTVID,
.priv_data_size = sizeof(BethsoftvidContext),
.init = bethsoftvid_decode_init,
.close = bethsoftvid_decode_end,
.decode = bethsoftvid_decode_frame,
};

9
libavcodec/bethsoftvideo.h Normal file
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@ -0,0 +1,9 @@
#define VID_PALETTE_NUMCOLORS 256
enum BethsoftVidBlockType
{
PALETTE_BLOCK = 0x02,
FIRST_AUDIO_BLOCK = 0x7c, AUDIO_BLOCK = 0x7d,
VIDEO_FULL_FRAME_BLOCK = 0x03, VIDEO_DIFFERENCE_FRAME_BLOCK = 0x01, VIDEO_YOFFSET_DIFFERENCE_FRAME_BLOCK = 0x04,
FINISHED_BLOCK = 0x14,
};

1
libavformat/Makefile
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@ -28,6 +28,7 @@ OBJS-$(CONFIG_AVI_DEMUXER) += avidec.o riff.o
OBJS-$(CONFIG_AVI_MUXER) += avienc.o riff.o
OBJS-$(CONFIG_AVISYNTH) += avisynth.o
OBJS-$(CONFIG_AVS_DEMUXER) += avs.o vocdec.o voc.o riff.o
OBJS-$(CONFIG_BETHSOFTVID_DEMUXER) += bethsoftvid.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o
OBJS-$(CONFIG_CRC_MUXER) += crc.o
OBJS-$(CONFIG_FRAMECRC_MUXER) += crc.o

1
libavformat/allformats.c
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@ -58,6 +58,7 @@ void av_register_all(void)
av_register_input_format(&avisynth_demuxer);
#endif
REGISTER_DEMUXER (AVS, avs);
REGISTER_DEMUXER (BETHSOFTVID, bethsoftvid);
REGISTER_DEMUXER (C93, c93);
REGISTER_MUXER (CRC, crc);
REGISTER_DEMUXER (DAUD, daud);

1
libavformat/allformats.h
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@ -32,6 +32,7 @@ extern AVInputFormat audio_demuxer;
extern AVInputFormat avi_demuxer;
extern AVInputFormat avisynth_demuxer;
extern AVInputFormat avs_demuxer;
extern AVInputFormat bethsoftvid_demuxer;
extern AVInputFormat c93_demuxer;
extern AVInputFormat daud_demuxer;
extern AVInputFormat dc1394_demuxer;

234
libavformat/bethsoftvid.c Normal file
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@ -0,0 +1,234 @@
/*
* Bethsoft VID format Demuxer
* Copyright (c) 2007 Nicholas Tung
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file bethsoftvid.c
* @brief Bethesda Softworks VID (.vid) file demuxer
* @author Nicholas Tung [ntung (at. ntung com] (2007-03)
* @sa http://wiki.multimedia.cx/index.php?title=Bethsoft_VID
* @sa http://www.svatopluk.com/andux/docs/dfvid.html
*/
#include "avformat.h"
#include "bethsoftvideo.h"
typedef struct BVID_DemuxContext
{
int nframes;
/** delay value between frames, added to individual frame delay.
* custom units, which will be added to other custom units (~=16ms according
* to free, unofficial documentation) */
int bethsoft_global_delay;
/** video presentation time stamp.
* delay = 16 milliseconds * (global_delay + per_frame_delay) */
int64_t video_pts;
int is_finished;
} BVID_DemuxContext;
static int vid_probe(AVProbeData *p)
{
// little endian VID tag, file starts with "VID\0"
if (p->buf_size < 4 || AV_RL32(p->buf) != MKTAG('V', 'I', 'D', 0))
return 0;
return AVPROBE_SCORE_MAX;
}
static int vid_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
BVID_DemuxContext *vid = s->priv_data; // permanent data outside of function
ByteIOContext *pb = &s->pb; // io to file
AVStream *stream;
/* load main header. Contents:
* bytes: 'V' 'I' 'D'
* int16s: always_512, nframes, width, height, delay, always_14
*/
url_fseek(pb, 5, SEEK_CUR);
vid->nframes = get_le16(pb);
// FFmpeg central code will use this; don't need to return or anything
// initialize the bethsoft codec
stream = av_new_stream(s, 0);
if (!stream) { return AVERROR_NOMEM; }
av_set_pts_info(stream, 32, 1, 60); // 16 ms increments, i.e. 60 fps
stream->codec->codec_type = CODEC_TYPE_VIDEO;
stream->codec->codec_id = CODEC_ID_BETHSOFTVID;
stream->codec->width = get_le16(pb);
stream->codec->height = get_le16(pb);
stream->codec->pix_fmt = PIX_FMT_PAL8;
vid->bethsoft_global_delay = get_le16(pb);
get_le16(pb);
// done with video codec, set up audio codec
stream = av_new_stream(s, 0);
if (!stream) { return AVERROR_NOMEM; }
stream->codec->codec_type = CODEC_TYPE_AUDIO;
stream->codec->codec_id = CODEC_ID_PCM_U8;
stream->codec->channels = 1;
stream->codec->sample_rate = 11025;
stream->codec->bits_per_sample = 8;
stream->codec->bit_rate = stream->codec->channels * stream->codec->sample_rate * stream->codec->bits_per_sample;
return 0;
}
#define BUFFER_PADDING_SIZE 1000
static int read_frame(BVID_DemuxContext *vid, ByteIOContext *pb, AVPacket *pkt,
uint8_t block_type, AVFormatContext *s, int npixels)
{
uint8_t * vidbuf_start = NULL;
int vidbuf_nbytes = 0;
int rle_num_bytes;
int bytes_copied = 0;
int position;
size_t vidbuf_capacity;
vidbuf_start = av_malloc(vidbuf_capacity = BUFFER_PADDING_SIZE);
if(!vidbuf_start) { return AVERROR_NOMEM; }
// save the file position for the packet, include block type
position = url_ftell(pb) - 1;
// set the block type for the decoder
vidbuf_start[vidbuf_nbytes++] = block_type;
// get the video delay (next int16), and set the presentation time
vid->video_pts += vid->bethsoft_global_delay + get_le16(pb);
// set the y offset if it exists (decoder header data should be in data section)
if(block_type == VIDEO_YOFFSET_DIFFERENCE_FRAME_BLOCK)
{
if(get_buffer(pb, &vidbuf_start[vidbuf_nbytes], 2) != 2) { return AVERROR_IO; }
vidbuf_nbytes += 2;
}
do
{
vidbuf_start = av_fast_realloc(vidbuf_start, &vidbuf_capacity, vidbuf_nbytes + BUFFER_PADDING_SIZE);
if(!vidbuf_start) { return AVERROR_NOMEM; }
rle_num_bytes = get_byte(pb);
vidbuf_start[vidbuf_nbytes++] = rle_num_bytes;
if(rle_num_bytes > 0x80) // rle sequence
{
if(block_type == VIDEO_FULL_FRAME_BLOCK) { vidbuf_start[vidbuf_nbytes++] = get_byte(pb); }
bytes_copied += rle_num_bytes - 0x80;
}
else if(rle_num_bytes) // plain sequence
{
if(get_buffer(pb, &vidbuf_start[vidbuf_nbytes], rle_num_bytes) != rle_num_bytes)
return AVERROR_IO;
vidbuf_nbytes += rle_num_bytes;
bytes_copied += rle_num_bytes;
}
if(bytes_copied == npixels) // sometimes no stop character is given, need to keep track of bytes copied
{
// may contain a 0 byte even if read all pixels
if(get_byte(pb)) { url_fseek(pb, -1, SEEK_CUR); }
break;
}
if(bytes_copied > npixels) { return -1; } // error
} while(rle_num_bytes);
// copy data into packet
if(av_new_packet(pkt, vidbuf_nbytes)) { return AVERROR_NOMEM; }
memcpy(pkt->data, vidbuf_start, vidbuf_nbytes);
av_free(vidbuf_start);
pkt->pos = position;
pkt->stream_index = 0; // use the video decoder, which was initialized as the first stream
pkt->pts = vid->video_pts;
vid->nframes--; // used to check if all the frames were read
return vidbuf_nbytes;
}
static int vid_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
BVID_DemuxContext *vid = s->priv_data; // permanent data outside of function
ByteIOContext *pb = &s->pb; // io to file
unsigned char block_type; // block type
int audio_length;
int ret_value;
av_log(s, AV_LOG_DEBUG, "[bethsoftvid demuxer read_packet]");
if(vid->is_finished || url_feof(pb)) { return AVERROR_IO; }
block_type = get_byte(pb);
switch(block_type)
{
case PALETTE_BLOCK:
av_log(s, AV_LOG_DEBUG, "palette block.\n");
url_fseek(pb, -1, SEEK_CUR); // include block type
ret_value = av_get_packet(pb, pkt, 3 * VID_PALETTE_NUMCOLORS + 1);
if(ret_value != 3 * VID_PALETTE_NUMCOLORS + 1) { av_free_packet(pkt); return AVERROR_IO; }
pkt->stream_index = 0;
return ret_value;
case FIRST_AUDIO_BLOCK:
av_log(s, AV_LOG_DEBUG, "first ");
get_le16(pb); // some unused constant
// soundblaster DAC used for sample rate, as on specification page (link above)
s->streams[1]->codec->sample_rate = 1000000 / (256 - get_byte(pb));
s->streams[1]->codec->bit_rate = s->streams[1]->codec->channels * s->streams[1]->codec->sample_rate * s->streams[1]->codec->bits_per_sample;
case AUDIO_BLOCK:
av_log(s, AV_LOG_DEBUG, "audio block.\n");
audio_length = get_le16(pb);
ret_value = av_get_packet(pb, pkt, audio_length);
pkt->stream_index = 1;
return (ret_value != audio_length ? AVERROR_IO : ret_value);
case VIDEO_DIFFERENCE_FRAME_BLOCK: av_log(s, AV_LOG_DEBUG, "non-");
case VIDEO_YOFFSET_DIFFERENCE_FRAME_BLOCK: av_log(s, AV_LOG_DEBUG, "offset ");
case VIDEO_FULL_FRAME_BLOCK: av_log(s, AV_LOG_DEBUG, "video block.\n");
return read_frame(vid, pb, pkt, block_type, s,
s->streams[0]->codec->width * s->streams[0]->codec->height);
case FINISHED_BLOCK:
if(vid->nframes != 0)
av_log(s, AV_LOG_VERBOSE, "reached terminating character but not all frames read.\n");
vid->is_finished = 1;
av_log(s, AV_LOG_DEBUG, "terminating block.\n");
return AVERROR_IO;
default:
av_log(s, AV_LOG_ERROR, "unknown block (character = %c, decimal = %d, hex = %x)!!!\n",
block_type, block_type, block_type); return -1;
}
return 0;
}
AVInputFormat bethsoftvid_demuxer = {
"bethsoftvid",
"Bethesda Softworks 'Daggerfall' VID format",
sizeof(BVID_DemuxContext),
vid_probe,
vid_read_header,
vid_read_packet,
};